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Jeong MJ, Wang Z, Zou WQ, Kim YC, Jeong BH. The first report of polymorphisms of the prion protein gene ( PRNP) in Pekin ducks ( Anas platyrhynchos domestica). Front Vet Sci 2023; 10:1273050. [PMID: 38026621 PMCID: PMC10664711 DOI: 10.3389/fvets.2023.1273050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2023] [Accepted: 10/26/2023] [Indexed: 12/01/2023] Open
Abstract
Background Prion diseases have been extensively reported in various mammalian species and are caused by a pathogenic prion protein (PrPSc), which is a misfolded version of cellular prion protein (PrPC). Notably, no cases of prion disease have been reported in birds. Single nucleotide polymorphisms (SNPs) of the prion protein gene (PRNP) that encodes PrP have been associated with susceptibility to prion diseases in several species. However, no studies on PRNP polymorphisms in domestic ducks have been reported thus far. Method To investigate PRNP polymorphisms in domestic ducks, we isolated genomic DNA from 214 Pekin duck samples and sequenced the coding region of the Pekin duck PRNP gene. We analyzed genotype, allele, and haplotype distributions and linkage disequilibrium (LD) among the SNPs of the Pekin duck PRNP gene. In addition, we evaluated the effects of the one non-synonymous SNP on the function and structure of PrP using the PROVEAN, PANTHER, SNPs & GO, SODA, and AMYCO in silico prediction programs. Results We found five novel SNPs, c.441 T > C, c.495 T > C, c.582A > G, c.710C > T(P237L), and c.729C > T, in the ORF region of the PRNP gene in 214 Pekin duck samples. We observed strong LD between c.441 T > C and c.582A > G (0.479), and interestingly, the link between c.495 T > C and c.729C > T was in perfect LD, with an r2 value of 1.0. In addition, we identified the five major haplotype frequencies: TTACC, CTGCC, CTACC, CCGCT, and CTATC. Furthermore, we found that the non-synonymous SNP, c.710C > T (P237L), had no detrimental effects on the function or structure of Pekin duck PrP. However, the non-synonymous SNP had deleterious effects on the aggregation propensity and solubility of Pekin duck PrP compared with wildtype Pekin duck PrP. Conclusion To the best of our knowledge, this study is the first report on the genetic characteristics of PRNP SNPs in Pekin ducks.
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Affiliation(s)
- Min-Ju Jeong
- Korea Zoonosis Research Institute, Jeonbuk National University, Iksan, Republic of Korea
- Department of Bioactive Material Sciences, Jeonbuk National University, Jeonju, Republic of Korea
| | - Zerui Wang
- Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, OH, United States
| | - Wen-Quan Zou
- Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, OH, United States
| | - Yong-Chan Kim
- Department of Biological Sciences, Andong National University, Andong, Republic of Korea
| | - Byung-Hoon Jeong
- Korea Zoonosis Research Institute, Jeonbuk National University, Iksan, Republic of Korea
- Department of Bioactive Material Sciences, Jeonbuk National University, Jeonju, Republic of Korea
- Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, OH, United States
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Sola D, Artigas R, Mediano DR, Zaragoza P, Badiola JJ, Martín-Burriel I, Acín C. Novel polymorphisms in the prion protein gene (PRNP) and stability of the resultant prion protein in different horse breeds. Vet Res 2023; 54:94. [PMID: 37848924 PMCID: PMC10583458 DOI: 10.1186/s13567-023-01211-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Accepted: 08/22/2023] [Indexed: 10/19/2023] Open
Abstract
Prion diseases are fatal neurodegenerative disorders in which the main pathogenic event is the conversion of the cellular prion protein (PrPC) into an abnormal and misfolded isoform known as PrPSc. Most prion diseases and their susceptibility and pathogenesis are mainly modulated by the PRNP gene that codes for PrP. Mutations and polymorphisms in the PRNP gene can alter PrPC amino acid sequence, leading to a change in transmission efficiency depending on the place where it occurs. Horses are animals that are considered to be highly resistant to prions. Several studies have attempted to identify polymorphisms in the PRNP gene that explain the reason for this high resistance. In this study, we have analysed 207 horses from 20 different breeds, discovering 3 novel PRNP polymorphisms. By using computer programmes such as PolyPhen-2, PROVEAN, PANTHER, Meta-SNP and PredictSNP, we have predicted the possible impact that these new polymorphisms would have on the horse prion protein. In addition, we measured the propensity for amyloid aggregation using AMYCO and analysed the lack of hydrogen bridges that these changes would entail together with their electrostatic potentials using Swiss-PdbViewer software, showing that an increased amyloid propensity could be due to changes at the level of electrostatic potentials.
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Affiliation(s)
- Diego Sola
- Centro de Encefalopatías Y Enfermedades Transmisibles Emergentes, Universidad de Zaragoza, IA2, IIS Aragón, 50013, Zaragoza, Spain.
| | - Rody Artigas
- Facultad de Veterinaria, Unidad Académica de Genética Y Mejora Animal, Universidad de La República, Ruta 8 Km18, 13000, Montevideo, Uruguay
| | - Diego R Mediano
- Laboratory of Biochemical Genetics (LAGENBIO), Faculty of Veterinary, Institute for Health Research Aragon (IIS Aragón), AgriFood Institute of Aragon (IA2), University of Zaragoza, Miguel Servet 177, 50013, Zaragoza, Spain
| | - Pilar Zaragoza
- Laboratory of Biochemical Genetics (LAGENBIO), Faculty of Veterinary, Institute for Health Research Aragon (IIS Aragón), AgriFood Institute of Aragon (IA2), University of Zaragoza, Miguel Servet 177, 50013, Zaragoza, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas (CIBERNED), Instituto Carlos III, 28029, Madrid, Spain
| | - Juan José Badiola
- Centro de Encefalopatías Y Enfermedades Transmisibles Emergentes, Universidad de Zaragoza, IA2, IIS Aragón, 50013, Zaragoza, Spain
| | - Inmaculada Martín-Burriel
- Centro de Encefalopatías Y Enfermedades Transmisibles Emergentes, Universidad de Zaragoza, IA2, IIS Aragón, 50013, Zaragoza, Spain
- Laboratory of Biochemical Genetics (LAGENBIO), Faculty of Veterinary, Institute for Health Research Aragon (IIS Aragón), AgriFood Institute of Aragon (IA2), University of Zaragoza, Miguel Servet 177, 50013, Zaragoza, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas (CIBERNED), Instituto Carlos III, 28029, Madrid, Spain
| | - Cristina Acín
- Centro de Encefalopatías Y Enfermedades Transmisibles Emergentes, Universidad de Zaragoza, IA2, IIS Aragón, 50013, Zaragoza, Spain
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Di Piazza G, Lyytikäinen T, Ru G, Simmons M, Ortiz‐Peláez A. Evaluation of the application of the Czech Republic to be recognised as having a negligible risk of classical scrapie. EFSA J 2023; 21:e08335. [PMID: 37881330 PMCID: PMC10594138 DOI: 10.2903/j.efsa.2023.8335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2023] Open
Abstract
The Czech Republic submitted a request to the European Commission to be recognised as a Member State with negligible risk of classical scrapie. EFSA has been asked to assess if the Czech Republic in its application has demonstrated for a period of at least 7 years (2015-2021) and proposed for the future, that a sufficient number of ovine and caprine animals over 18 months of age, representative of slaughtered, culled or found dead on farm animals, have been and will continue to be tested annually to provide a 95% level of confidence of detecting classical scrapie if it is present in that population at a prevalence rate exceeding 0.1%. A risk-based approach using stochastic scenario-tree modelling accounting for surveillance stream and species was applied. There is still a lack of data on the actual performance of the approved tests under field conditions, especially in sheep. Therefore, alternative scenarios were explored extending the range from the sensitivity provided by the past European Union evaluations of diagnostic screening tests to a sensitivity of 50%, consistent with published data obtained under field conditions in infected goat populations. Using data provided by the Czech Republic for 2015-2022, the estimated parameters of the scenario-tree model, the range of values of diagnostic sensitivity and applying the criterion for the 95% confidence level, it is concluded that the Czech Republic has tested annually a sufficient number of small ruminants to meet the requirement, for all combinations of years and diagnostic sensitivity scenarios except for 60% diagnostic sensitivity in 2021 and 2022, and 50% in 2015, 2016 and 2018-2022. Based on the proposed number of samples to be tested in 2023 and future years, the Czech Republic would test a sufficient number of animals to meet the requirement for all combinations of diagnostic sensitivity, except for the 50% scenario.
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Jo WS, Kim YC, Oem JK, Jeong BH. First report of structural characteristics and polymorphisms of the prion protein gene in raccoon dogs: The possibility of prion disease-resistance. Front Vet Sci 2022; 9:989352. [PMID: 36204297 PMCID: PMC9530392 DOI: 10.3389/fvets.2022.989352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Accepted: 08/25/2022] [Indexed: 11/16/2022] Open
Abstract
Prion diseases are fatal degenerative encephalopathies caused by misfolded prion protein (PrPSc) converted from normal prion protein (PrPC). Previous studies have reported that genetic polymorphisms of the prion protein gene (PRNP) play a critical role in susceptibility to prion diseases. In addition, prion disease-resistant animals showed unique structural features of prion protein (PrP) related to species-specific amino acids. However, investigations of genetic polymorphisms of the PRNP gene and structural characteristics of PrP have not been performed in raccoon dogs thus far. We investigated genetic polymorphisms of PRNP in 87 raccoon dogs using amplicon sequencing and analyzed the genotype, allele, haplotype frequencies, and linkage disequilibrium (LD) using Haploview version 4.2. In addition, we performed phylogenetic analysis and multiple sequence alignment (MSA) using MEGA X version 10.1.8 and Clustal X version 2.1, respectively. We estimated the impact of raccoon dog and Canidae family-specific amino acids using PolyPhen-2, PROVEAN, and AMYCO. Furthermore, we analyzed the effect of raccoon dog and Canidae family-specific amino acids using the AlphaFold2 and Swiss-PdbViewer programs. We found 4 novel single nucleotide polymorphisms (SNPs) of the raccoon dog PRNP gene. In addition, the raccoon dog PrP showed 99.61% identity and the closest genetic distance to dog PrP. Among the substitutions of Canidae-specific amino acids with interspecific amino acids, D163N showed increased amyloidogenic propensity, and R181H showed alterations of hydrogen bonds. Furthermore, electrostatic potentials were changed according to the substitutions of D163N and R181H. By comparing PrP between raccoon dogs and raccoons, R168K and K224R were found to be related to changes in hydrogen bonds, and K224R altered the electrostatic potential of raccoon dog PrP. In the present study, we first reported 4 novel synonymous SNPs of the raccoon dog PRNP gene. We also identified that the PrP of raccoon dog has high homology (99.61%) with PrP of dog, which is a prion-resistant animal. In addition, raccoon dog PrP-specific amino acids are related to low amyloid propensity and inherent characteristics of 3D structure of raccoon dog PrP compared to the PrP of prion-susceptible species.
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Affiliation(s)
- Woo-Sung Jo
- Korea Zoonosis Research Institute, Jeonbuk National University, Iksan, South Korea
- Department of Bioactive Material Sciences, Jeonbuk National University, Jeonju, South Korea
| | - Yong-Chan Kim
- Korea Zoonosis Research Institute, Jeonbuk National University, Iksan, South Korea
- Department of Bioactive Material Sciences, Jeonbuk National University, Jeonju, South Korea
| | - Jae-Ku Oem
- Laboratory of Veterinary Infectious Diseases, College of Veterinary Medicine, Jeonbuk National University, Iksan, South Korea
| | - Byung-Hoon Jeong
- Korea Zoonosis Research Institute, Jeonbuk National University, Iksan, South Korea
- Department of Bioactive Material Sciences, Jeonbuk National University, Jeonju, South Korea
- *Correspondence: Byung-Hoon Jeong
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Zeineldin M, Lehman K, Urie N, Branan M, Wiedenheft A, Marshall K, Robbe-Austerman S, Thacker T. Large-scale survey of prion protein genetic variability in scrapie disease-free goats from the United States. PLoS One 2021; 16:e0254998. [PMID: 34280230 PMCID: PMC8289333 DOI: 10.1371/journal.pone.0254998] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Accepted: 07/08/2021] [Indexed: 11/19/2022] Open
Abstract
Scrapie is a slowly progressive neurodegenerative disease of small ruminants caused by an accumulation of an abnormal isoform of prion protein in the central nervous system. Polymorphisms of the prion protein gene (PRNP) strongly modulate scrapie resistance and incubation period in goats. The aim of this study was to identify PRNP genetic variability in goats across the United States. Blood from a total of 6,029 apparent scrapie disease-free goats from 654 operations and 19 breeds were analyzed. Sequencing of PRNP revealed 26 genotypes with different rates based on eight codons. The GG127, RR154, and QQ222 genotypes were predominant and showed a remarkably high rate across all goats. The QK222 and NS146 genotypes, known to be protective against scrapie, were found in 0.6% [with 95% CI = (0.3, 1.2)] and 22.0% [95% CI = (19.1, 25.2)] of goats, respectively. The QK222 genotype was found in 23.1% of Oberhasli goats tested, with 95%CI = (3.9, 68.7)] and 22.0% of Toggenburg goats tested with 95%CI = (9.7, 42.5)], while NS146 was found in 65.5% of Savannah goats tested, with 95%CI = (30.8, 89.9), 36.7% of Boer goats tested, with 95%CI = (33.1, 40.4), 36.3% of Nubian goats tested, with 95%CI = (27.0, 46.7)], and 35.6% of LaMancha goats tested, with 95%CI = (22.8, 50.8%). The MM142 and IM142 genotypes were found more frequently in goats on dairy operations, while the HR143, NS146, and ND146 genotypes were found more frequently in goats on meat operations. Goats in the east region had a higher percentage of goats with RH154, RQ211, and QK222 genotypes than goats in the west region. The results of this study showed high genetic variability of PRNP among the U.S. goat population, with differences by location and breed, and may serve as a rationale for development of goat breeding programs at the national level to mitigate the risk of scrapie.
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Affiliation(s)
- Mohamed Zeineldin
- National Veterinary Services Laboratories, Veterinary Services, Animal and Plant Health Inspection Service, United States Department of Agriculture, Ames, IA, United States of America
- Department of Animal Medicine, College of Veterinary Medicine, Benha University, Benha, Egypt
| | - Kimberly Lehman
- National Veterinary Services Laboratories, Veterinary Services, Animal and Plant Health Inspection Service, United States Department of Agriculture, Ames, IA, United States of America
| | - Natalie Urie
- National Animal Health Monitoring System, Veterinary Services, Animal and Plant Health Inspection Service, United States Department of Agriculture, Fort Collins, CO, United States of America
- Department of Clinical Sciences, Colorado State University, Fort Collins, CO, United States of America
| | - Matthew Branan
- National Animal Health Monitoring System, Veterinary Services, Animal and Plant Health Inspection Service, United States Department of Agriculture, Fort Collins, CO, United States of America
| | - Alyson Wiedenheft
- National Animal Health Monitoring System, Veterinary Services, Animal and Plant Health Inspection Service, United States Department of Agriculture, Fort Collins, CO, United States of America
- Department of Clinical Sciences, Colorado State University, Fort Collins, CO, United States of America
| | - Katherine Marshall
- National Animal Health Monitoring System, Veterinary Services, Animal and Plant Health Inspection Service, United States Department of Agriculture, Fort Collins, CO, United States of America
| | - Suelee Robbe-Austerman
- National Veterinary Services Laboratories, Veterinary Services, Animal and Plant Health Inspection Service, United States Department of Agriculture, Ames, IA, United States of America
| | - Tyler Thacker
- National Veterinary Services Laboratories, Veterinary Services, Animal and Plant Health Inspection Service, United States Department of Agriculture, Ames, IA, United States of America
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Neuropathology of Animal Prion Diseases. Biomolecules 2021; 11:biom11030466. [PMID: 33801117 PMCID: PMC8004141 DOI: 10.3390/biom11030466] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 03/04/2021] [Accepted: 03/18/2021] [Indexed: 01/09/2023] Open
Abstract
Transmissible Spongiform Encephalopathies (TSEs) or prion diseases are a fatal group of infectious, inherited and spontaneous neurodegenerative diseases affecting human and animals. They are caused by the conversion of cellular prion protein (PrPC) into a misfolded pathological isoform (PrPSc or prion- proteinaceous infectious particle) that self-propagates by conformational conversion of PrPC. Yet by an unknown mechanism, PrPC can fold into different PrPSc conformers that may result in different prion strains that display specific disease phenotype (incubation time, clinical signs and lesion profile). Although the pathways for neurodegeneration as well as the involvement of brain inflammation in these diseases are not well understood, the spongiform changes, neuronal loss, gliosis and accumulation of PrPSc are the characteristic neuropathological lesions. Scrapie affecting small ruminants was the first identified TSE and has been considered the archetype of prion diseases, though atypical and new animal prion diseases continue to emerge highlighting the importance to investigate the lesion profile in naturally affected animals. In this report, we review the neuropathology and the neuroinflammation of animal prion diseases in natural hosts from scrapie, going through the zoonotic bovine spongiform encephalopathy (BSE), the chronic wasting disease (CWD) to the newly identified camel prion disease (CPD).
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Classical and Atypical Scrapie in Sheep and Goats. Review on the Etiology, Genetic Factors, Pathogenesis, Diagnosis, and Control Measures of Both Diseases. Animals (Basel) 2021; 11:ani11030691. [PMID: 33806658 PMCID: PMC7999988 DOI: 10.3390/ani11030691] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 02/23/2021] [Accepted: 02/25/2021] [Indexed: 12/31/2022] Open
Abstract
Prion diseases, such as scrapie, are neurodegenerative diseases with a fatal outcome, caused by a conformational change of the cellular prion protein (PrPC), originating with the pathogenic form (PrPSc). Classical scrapie in small ruminants is the paradigm of prion diseases, as it was the first transmissible spongiform encephalopathy (TSE) described and is the most studied. It is necessary to understand the etiological properties, the relevance of the transmission pathways, the infectivity of the tissues, and how we can improve the detection of the prion protein to encourage detection of the disease. The aim of this review is to perform an overview of classical and atypical scrapie disease in sheep and goats, detailing those special issues of the disease, such as genetic factors, diagnostic procedures, and surveillance approaches carried out in the European Union with the objective of controlling the dissemination of scrapie disease.
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Salvesen Ø, Espenes A, Reiten MR, Vuong TT, Malachin G, Tran L, Andréoletti O, Olsaker I, Benestad SL, Tranulis MA, Ersdal C. Goats naturally devoid of PrP C are resistant to scrapie. Vet Res 2020; 51:1. [PMID: 31924264 PMCID: PMC6954626 DOI: 10.1186/s13567-019-0731-2] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Accepted: 12/17/2019] [Indexed: 12/14/2022] Open
Abstract
Prion diseases are progressive and fatal, neurodegenerative disorders described in humans and animals. According to the "protein-only" hypothesis, the normal host-encoded prion protein (PrPC) is converted into a pathological and infectious form (PrPSc) in these diseases. Transgenic knockout models have shown that PrPC is a prerequisite for the development of prion disease. In Norwegian dairy goats, a mutation (Ter) in the prion protein gene (PRNP) effectively blocks PrPC synthesis. We inoculated 12 goats (4 PRNP+/+, 4 PRNP+/Ter, and 4 PRNPTer/Ter) intracerebrally with goat scrapie prions. The mean incubation time until clinical signs of prion disease was 601 days post-inoculation (dpi) in PRNP+/+ goats and 773 dpi in PRNP+/Ter goats. PrPSc and vacuolation were similarly distributed in the central nervous system (CNS) of both groups and observed in all brain regions and segments of the spinal cord. Generally, accumulation of PrPSc was limited in peripheral organs, but all PRNP+/+ goats and 1 of 4 PRNP+/Ter goats were positive in head lymph nodes. The four PRNPTer/Ter goats remained healthy, without clinical signs of prion disease, and were euthanized 1260 dpi. As expected, no accumulation of PrPSc was observed in the CNS or peripheral tissues of this group, as assessed by immunohistochemistry, enzyme immunoassay, and real-time quaking-induced conversion. Our study shows for the first time that animals devoid of PrPC due to a natural mutation do not propagate prions and are resistant to scrapie. Clinical onset of disease is delayed in heterozygous goats expressing about 50% of PrPC levels.
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Affiliation(s)
- Øyvind Salvesen
- Department of Production Animal Clinical Sciences, Faculty of Veterinary Medicine, Norwegian University of Life Sciences, Sandnes, Norway
| | - Arild Espenes
- Department of Basic Sciences and Aquatic Medicine, Faculty of Veterinary Medicine, Norwegian University of Life Sciences, Oslo, Norway
| | - Malin R. Reiten
- Department of Basic Sciences and Aquatic Medicine, Faculty of Veterinary Medicine, Norwegian University of Life Sciences, Oslo, Norway
- Norwegian Veterinary Institute, Oslo, Norway
| | | | - Giulia Malachin
- Department of Basic Sciences and Aquatic Medicine, Faculty of Veterinary Medicine, Norwegian University of Life Sciences, Oslo, Norway
| | - Linh Tran
- Norwegian Veterinary Institute, Oslo, Norway
| | | | - Ingrid Olsaker
- Department of Basic Sciences and Aquatic Medicine, Faculty of Veterinary Medicine, Norwegian University of Life Sciences, Oslo, Norway
| | | | - Michael A. Tranulis
- Department of Basic Sciences and Aquatic Medicine, Faculty of Veterinary Medicine, Norwegian University of Life Sciences, Oslo, Norway
| | - Cecilie Ersdal
- Department of Production Animal Clinical Sciences, Faculty of Veterinary Medicine, Norwegian University of Life Sciences, Sandnes, Norway
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Simmons MM, Thorne L, Ortiz-Pelaez A, Spiropoulos J, Georgiadou S, Papasavva-Stylianou P, Andreoletti O, Hawkins SA, Meloni D, Cassar C. Transmissible spongiform encephalopathy in goats: is PrP rapid test sensitivity affected by genotype? J Vet Diagn Invest 2020; 32:87-93. [PMID: 31894737 PMCID: PMC7003235 DOI: 10.1177/1040638719896327] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Transmissible spongiform encephalopathy (TSE) surveillance in goats relies on tests initially approved for cattle, subsequently assessed for sheep, and approval extrapolated for use in "small ruminants." The current EU-approved immunodetection tests employ antibodies against various epitopes of the prion protein PrPSc, which is encoded by the host PRNP gene. The caprine PRNP gene is polymorphic, mostly at codons different from the ovine PRNP. The EU goat population is much more heterogeneous than the sheep population, with more PRNP-related polymorphisms, and with marked breed-related differences. The ability of the current tests to detect disease-specific PrPSc generated against these different genetic backgrounds is currently assumed, rather than proven. We examined whether common polymorphisms within the goat PRNP gene might have any adverse effect on the relative performance of EU-approved rapid tests. The sample panel comprised goats from the UK, Cyprus, France, and Italy, with either experimental or naturally acquired scrapie at both the preclinical and/or unknown and clinical stages of disease. Test sensitivity was significantly lower and more variable when compared using samples from animals that were preclinical or of unknown status. However, all of the rapid tests included in our study were able to correctly identify all samples from animals in the clinical stages of disease, apart from samples from animals polymorphic for serine or aspartic acid at codon 146, in which the performance of the Bio-Rad tests was profoundly affected. Our data show that some polymorphisms may adversely affect one test and not another, as well as underline the dangers of extrapolating from other species.
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Affiliation(s)
- Marion M. Simmons
- APHA-Weybridge, Addlestone, Surrey, UK (Simmons, Thorne, Spiropoulos, Hawkins, Cassar)
- Unit of Biological Hazards and Contaminants (BIOCONTAM), Risk Assessment & Scientific Assistance, European Food Safety Authority (EFSA), Parma, Italy (Ortiz-Pelaez)
- Veterinary Services of Cyprus, Nicosia, Cyprus (Georgiadou, Papasavva-Stylianou)
- UMR Institut National de la Recherche Agronomique, École Nationale Vétérinaire de Toulouse, Toulouse, France (Andreoletti)
- Italian Reference Laboratory for TSEs, Istituto Zooprofilattico Sperimentale del Piemonte, Turin, Italy (Meloni)
| | - Leigh Thorne
- APHA-Weybridge, Addlestone, Surrey, UK (Simmons, Thorne, Spiropoulos, Hawkins, Cassar)
- Unit of Biological Hazards and Contaminants (BIOCONTAM), Risk Assessment & Scientific Assistance, European Food Safety Authority (EFSA), Parma, Italy (Ortiz-Pelaez)
- Veterinary Services of Cyprus, Nicosia, Cyprus (Georgiadou, Papasavva-Stylianou)
- UMR Institut National de la Recherche Agronomique, École Nationale Vétérinaire de Toulouse, Toulouse, France (Andreoletti)
- Italian Reference Laboratory for TSEs, Istituto Zooprofilattico Sperimentale del Piemonte, Turin, Italy (Meloni)
| | - Angel Ortiz-Pelaez
- APHA-Weybridge, Addlestone, Surrey, UK (Simmons, Thorne, Spiropoulos, Hawkins, Cassar)
- Unit of Biological Hazards and Contaminants (BIOCONTAM), Risk Assessment & Scientific Assistance, European Food Safety Authority (EFSA), Parma, Italy (Ortiz-Pelaez)
- Veterinary Services of Cyprus, Nicosia, Cyprus (Georgiadou, Papasavva-Stylianou)
- UMR Institut National de la Recherche Agronomique, École Nationale Vétérinaire de Toulouse, Toulouse, France (Andreoletti)
- Italian Reference Laboratory for TSEs, Istituto Zooprofilattico Sperimentale del Piemonte, Turin, Italy (Meloni)
| | - John Spiropoulos
- APHA-Weybridge, Addlestone, Surrey, UK (Simmons, Thorne, Spiropoulos, Hawkins, Cassar)
- Unit of Biological Hazards and Contaminants (BIOCONTAM), Risk Assessment & Scientific Assistance, European Food Safety Authority (EFSA), Parma, Italy (Ortiz-Pelaez)
- Veterinary Services of Cyprus, Nicosia, Cyprus (Georgiadou, Papasavva-Stylianou)
- UMR Institut National de la Recherche Agronomique, École Nationale Vétérinaire de Toulouse, Toulouse, France (Andreoletti)
- Italian Reference Laboratory for TSEs, Istituto Zooprofilattico Sperimentale del Piemonte, Turin, Italy (Meloni)
| | - Soteria Georgiadou
- APHA-Weybridge, Addlestone, Surrey, UK (Simmons, Thorne, Spiropoulos, Hawkins, Cassar)
- Unit of Biological Hazards and Contaminants (BIOCONTAM), Risk Assessment & Scientific Assistance, European Food Safety Authority (EFSA), Parma, Italy (Ortiz-Pelaez)
- Veterinary Services of Cyprus, Nicosia, Cyprus (Georgiadou, Papasavva-Stylianou)
- UMR Institut National de la Recherche Agronomique, École Nationale Vétérinaire de Toulouse, Toulouse, France (Andreoletti)
- Italian Reference Laboratory for TSEs, Istituto Zooprofilattico Sperimentale del Piemonte, Turin, Italy (Meloni)
| | - Penelope Papasavva-Stylianou
- APHA-Weybridge, Addlestone, Surrey, UK (Simmons, Thorne, Spiropoulos, Hawkins, Cassar)
- Unit of Biological Hazards and Contaminants (BIOCONTAM), Risk Assessment & Scientific Assistance, European Food Safety Authority (EFSA), Parma, Italy (Ortiz-Pelaez)
- Veterinary Services of Cyprus, Nicosia, Cyprus (Georgiadou, Papasavva-Stylianou)
- UMR Institut National de la Recherche Agronomique, École Nationale Vétérinaire de Toulouse, Toulouse, France (Andreoletti)
- Italian Reference Laboratory for TSEs, Istituto Zooprofilattico Sperimentale del Piemonte, Turin, Italy (Meloni)
| | - Olivier Andreoletti
- APHA-Weybridge, Addlestone, Surrey, UK (Simmons, Thorne, Spiropoulos, Hawkins, Cassar)
- Unit of Biological Hazards and Contaminants (BIOCONTAM), Risk Assessment & Scientific Assistance, European Food Safety Authority (EFSA), Parma, Italy (Ortiz-Pelaez)
- Veterinary Services of Cyprus, Nicosia, Cyprus (Georgiadou, Papasavva-Stylianou)
- UMR Institut National de la Recherche Agronomique, École Nationale Vétérinaire de Toulouse, Toulouse, France (Andreoletti)
- Italian Reference Laboratory for TSEs, Istituto Zooprofilattico Sperimentale del Piemonte, Turin, Italy (Meloni)
| | - Stephen A.C. Hawkins
- APHA-Weybridge, Addlestone, Surrey, UK (Simmons, Thorne, Spiropoulos, Hawkins, Cassar)
- Unit of Biological Hazards and Contaminants (BIOCONTAM), Risk Assessment & Scientific Assistance, European Food Safety Authority (EFSA), Parma, Italy (Ortiz-Pelaez)
- Veterinary Services of Cyprus, Nicosia, Cyprus (Georgiadou, Papasavva-Stylianou)
- UMR Institut National de la Recherche Agronomique, École Nationale Vétérinaire de Toulouse, Toulouse, France (Andreoletti)
- Italian Reference Laboratory for TSEs, Istituto Zooprofilattico Sperimentale del Piemonte, Turin, Italy (Meloni)
| | - Daniela Meloni
- APHA-Weybridge, Addlestone, Surrey, UK (Simmons, Thorne, Spiropoulos, Hawkins, Cassar)
- Unit of Biological Hazards and Contaminants (BIOCONTAM), Risk Assessment & Scientific Assistance, European Food Safety Authority (EFSA), Parma, Italy (Ortiz-Pelaez)
- Veterinary Services of Cyprus, Nicosia, Cyprus (Georgiadou, Papasavva-Stylianou)
- UMR Institut National de la Recherche Agronomique, École Nationale Vétérinaire de Toulouse, Toulouse, France (Andreoletti)
- Italian Reference Laboratory for TSEs, Istituto Zooprofilattico Sperimentale del Piemonte, Turin, Italy (Meloni)
| | - Claire Cassar
- Claire Cassar, Department of Pathology, APHA-Weybridge, Woodham Lane, Addlestone, Surrey, KT15 3NB, UK.
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10
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Vitale M, Migliore S, Tilahun B, Abdurahaman M, Tolone M, Sammarco I, Di Marco Lo Presti V, Gebremedhin EZ. Two novel amino acid substitutions in highly conserved regions of prion protein (PrP) and a high frequency of a scrapie protective variant in native Ethiopian goats. BMC Vet Res 2019; 15:128. [PMID: 31053138 PMCID: PMC6500044 DOI: 10.1186/s12917-019-1870-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Accepted: 04/15/2019] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND Polymorphisms of the prion protein gene may influence scrapie susceptibility in small ruminants through modified protein conformation. At least 47 amino acid substitutions and 19 silent polymorphisms have been described in goat PRNP reported from several countries. The objective of this study was to investigate PRNP polymorphisms of native Ethiopian goat breeds and compare the results with other goat breeds. RESULTS The analysis of the prion protein gene PRNP in 229 goats belonging to three of the main Ethiopian native goat breeds showed a remarkably high frequency (> 34.6%) of p.(Asn146Ser) in these breeds, a variant involved in scrapie resistance in Cyprus. In addition, two novel amino-acid substitutions p.(Gly127Ala) and p.(Thr193Ile), with frequencies ranging from 1.5 to 7.3% were detected. Both amino acids are well conserved in prion proteins (PrP) of most species and these changes have never been reported before in goats worldwide. Residue 127 is within the N-terminal domain of PrP and is probably involved in the recruitment of neural cell adhesion molecules (NCAM). Residue 193 is within the highly conserved string of 4 threonines that plays a role in determining the efficiency of prion protein conversion towards its pathological form. CONCLUSION Two novel coding polymorphisms and a high frequency of a scrapie protective variant indicate a high level of genetic diversity in PRNP of Ethiopian goats. This finding increases the interest in exploring PRNP polymorphisms of native goat breeds in areas where cross breeding with foreign goats has rarely occurred.
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Affiliation(s)
- Maria Vitale
- Istituto Zooprofilattico Sperimentale of Sicily, Laboratory of Genetics of Microorganisms, Via Gino Marinuzzi 3, 90129 Palermo, Italy
| | - Sergio Migliore
- Istituto Zooprofilattico Sperimentale of Sicily, Laboratory of Genetics of Microorganisms, Via Gino Marinuzzi 3, 90129 Palermo, Italy
| | - Berhanu Tilahun
- Department of Parasitology, Haramaya University, College of Veterinary Medicine, P.O. Box 138, Dire Dawa, Ethiopia
| | - Mukarim Abdurahaman
- Jimma University, School of Veterinary Medicine, P.O. Box 307, Jimma, Ethiopia
| | - Marco Tolone
- Dipartimento Scienze Agrarie, Alimentari e Forestali, Università degli Studi di Palermo, Viale delle Scienze, 90128 Palermo, Italy
| | - Ignazio Sammarco
- Istituto Zooprofilattico Sperimentale of Sicily, Laboratory of Genetics of Microorganisms, Via Gino Marinuzzi 3, 90129 Palermo, Italy
| | - Vincenzo Di Marco Lo Presti
- Istituto Zooprofilattico Sperimentale of Sicily, Laboratory of Genetics of Microorganisms, Via Gino Marinuzzi 3, 90129 Palermo, Italy
| | - Endrias Zewdu Gebremedhin
- Department of Veterinary Science, Ambo University, College of Agriculture and Veterinary Sciences, P.O. Box 19, Ambo, Ethiopia
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11
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Jeong MJ, Kim YC, Jeong BH. Prion-like protein gene (PRND) polymorphisms associated with scrapie susceptibility in Korean native black goats. PLoS One 2018; 13:e0206209. [PMID: 30359416 PMCID: PMC6201918 DOI: 10.1371/journal.pone.0206209] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2018] [Accepted: 10/09/2018] [Indexed: 11/19/2022] Open
Abstract
The polymorphisms of the prion protein (PRNP) gene, which encodes normal prion proteins (PrP), are known to be involved in the susceptibility of prion diseases. The prion-like protein (Doppel) gene (PRND) is the paralog of the PRNP gene and is closely located downstream of the PRNP gene. In addition, the polymorphisms of PRND correlate with disease susceptibility in several animals. We analyzed the genotype and allele frequencies of PRND polymorphisms in 246 Korean native black goats and found a total of six single nucleotide polymorphisms (SNPs) with one novel SNP, c.99C>T. We observed linkage disequilibrium (LD) within and between loci. PRND c.28T>C, c.151A>G, and c.385G>C and PRND c.65C>T and c.286G>A were in perfect LD and we have reported for the first time strong LD between PRND and PRNP or prion-related protein gene (PRNT) loci. Specifically, between the PRND c.28T>C, c.151A>G and c.385G>C and the PRNP codon 143, PRND c.99C>T and the PRNP codon 102 or PRND SNPs (c.28T>C, c.151A>G and c.385G>C) and PRNT SNP (c.321T>C). Furthermore, we confirmed that the genotype distribution of the PRNP p.His143Arg was significantly different according to that of the PRND c.28T>C (P < 0.0001). Finally, using PolyPhen-2 and PROVEAN, we predicted that two non-synonymous SNPs, c.65C>T and c.286G>A, in the PRND gene can have a detrimental effect on Doppel. To the best of our knowledge, this is the first report of genetic characteristics of the PRND gene in Korean native black goats.
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Affiliation(s)
- Min-Ju Jeong
- Korea Zoonosis Research Institute, Chonbuk National University, Iksan, Jeonbuk, Republic of Korea
- Department of Bioactive Material Sciences, Chonbuk National University, Jeonju, Jeonbuk, Republic of Korea
| | - Yong-Chan Kim
- Korea Zoonosis Research Institute, Chonbuk National University, Iksan, Jeonbuk, Republic of Korea
- Department of Bioactive Material Sciences, Chonbuk National University, Jeonju, Jeonbuk, Republic of Korea
| | - Byung-Hoon Jeong
- Korea Zoonosis Research Institute, Chonbuk National University, Iksan, Jeonbuk, Republic of Korea
- Department of Bioactive Material Sciences, Chonbuk National University, Jeonju, Jeonbuk, Republic of Korea
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12
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Li J, Erdenee S, Zhang S, Wei Z, Zhang M, Jin Y, Wu H, Chen H, Sun X, Xu H, Cai Y, Lan X. Genetic effects of PRNP gene insertion/deletion (indel) on phenotypic traits in sheep. Prion 2018; 12:42-53. [PMID: 29394137 DOI: 10.1080/19336896.2017.1405886] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Prion protein (PRNP) gene is well known for affecting mammal transmissible spongiform encephalopathies (TSE), and is also reported to regulate phenotypic traits (e.g. growth traits) in healthy ruminants. To identify the insertion/deletion (indel) variations of the PRNP gene and evaluate their effects on growth traits, 768 healthy individuals from five sheep breeds located in China and Mongolia were identified and analyzed. Herein, four novel indel polymorphisms, namely, Intron-1-insertion-7bp (I1-7bp), Intron-2-insertion-15bp (I2-15bp), Intron-2-insertion-19bp (I2-19bp), and 3' UTR-insertion-7bp (3' UTR-7bp), were found in the sheep PRNP gene. In five analyzed breeds, the minor allelic frequencies (MAF) of the above indels were in the range of 0.008 to 0.986 (I1-7bp), 0.113 to 0.336 (I2-15bp), 0.281 to 0.510 (I2-19bp), and 0.040 to 0.238 (3' UTR-7bp). Additionally, there were 15 haplotypes and the haplotype 'II2-15bp-D3'UTR-7bp-DI2-19bp-DI1-7bp' had the highest frequency, which varied from 0.464 to 0.629 in five breeds. Moreover, association analysis revealed that all novel indel polymorphisms were significantly associated with 13 different growth traits (P < 0.05). Particularly, the influences of I2-15bp on chest width (P = 0.001) in Small Tail Han sheep (ewe), 3' UTR-7bp on chest circumference (P = 0.003) in Hu sheep, and I2-19bp on tail length (P = 0.001) in Tong sheep, were highly significant (P < 0.01). These findings may be a further step toward the detection of indel-based typing within and across sheep breeds, and of promising target loci for accelerating the progress of marker-assisted selection in sheep breeding.
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Affiliation(s)
- Jie Li
- a College of Animal Science and Technology, Innovation Experimental College, Northwest A&F University , Xi'an, Shaanxi , China
| | - Sarantsetseg Erdenee
- b College of Animal Science and Technology, Northwest A&F University , Xi'an , Shaanxi , China
| | - Shaoli Zhang
- a College of Animal Science and Technology, Innovation Experimental College, Northwest A&F University , Xi'an, Shaanxi , China
| | - Zhenyu Wei
- b College of Animal Science and Technology, Northwest A&F University , Xi'an , Shaanxi , China
| | - Meng Zhang
- b College of Animal Science and Technology, Northwest A&F University , Xi'an , Shaanxi , China
| | - Yunyun Jin
- b College of Animal Science and Technology, Northwest A&F University , Xi'an , Shaanxi , China
| | - Hui Wu
- b College of Animal Science and Technology, Northwest A&F University , Xi'an , Shaanxi , China
| | - Hong Chen
- c Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University , Yangling , Shaanxi , China
| | - Xiuzhu Sun
- b College of Animal Science and Technology, Northwest A&F University , Xi'an , Shaanxi , China
| | - Hongwei Xu
- d Science Experimental Center, College of Life Science and Engineering, Northwest University for Nationalities , Chengguan District, Lanzhou City in northwest, Lanzhou , Gansu , China
| | - Yong Cai
- d Science Experimental Center, College of Life Science and Engineering, Northwest University for Nationalities , Chengguan District, Lanzhou City in northwest, Lanzhou , Gansu , China
| | - Xianyong Lan
- b College of Animal Science and Technology, Northwest A&F University , Xi'an , Shaanxi , China
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13
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Cinar MU, Schneider DA, Waldron DF, O'Rourke KI, White SN. Goats singly heterozygous for PRNP S146 or K222 orally inoculated with classical scrapie at birth show no disease at ages well beyond 6 years. Vet J 2018; 233:19-24. [PMID: 29486874 DOI: 10.1016/j.tvjl.2017.12.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Revised: 12/21/2017] [Accepted: 12/23/2017] [Indexed: 10/18/2022]
Abstract
Scrapie is a transmissible spongiform encephalopathy of sheep and goats, and scrapie eradication programs in many parts of the world rely on strong genetic resistance to classical scrapie in sheep. However, the utility of putative resistance alleles in goats has been a focus of research because goats can transmit scrapie to sheep and may serve as a scrapie reservoir. Prior work showed that disease-free survival time was significantly extended in orally inoculated goats singly heterozygous for prion amino acid substitutions S146 or K222, but average durations were only around 3 years post-inoculation. The aim of this study was to investigate whether extended survival would exceed 6 years, which represents the productive lifetimes of most commercial goats. While all control homozygotes were clinically affected by an average of <2 years, none of the NS146 or QK222 goats developed clinical scrapie or had PrPSc-positive rectal biopsies. Several NS146 and QK222 goats developed other conditions unrelated to scrapie, but tissue accumulation of PrPSc was not detected in any of these animals. The NS146 heterozygotes have remained disease-free for an average of 2734days (approximately 7.5 years), the longest duration of any classical scrapie challenge experiment with any genotype to date. The QK222 heterozygotes have remained disease-free for an average of 2450days (approximately 6.7 years), the longest reported average duration for QK222 goats challenged with classical scrapie. This research is ongoing, but the current results demonstrate S146 and K222 confer strong resistance to classical scrapie in goats.
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Affiliation(s)
- M U Cinar
- Department of Veterinary Microbiology and Pathology, Washington State University, 3003 ADBF, WSU, Pullman, WA 99164, USA; Erciyes University, Faculty of Agriculture, Department of Animal Science, Kayseri 38039, Turkey
| | - D A Schneider
- Department of Veterinary Microbiology and Pathology, Washington State University, 3003 ADBF, WSU, Pullman, WA 99164, USA; United States Department of Agriculture, Agricultural Research Service, Animal Disease Research Unit, 3003 ADBF, WSU, Pullman, WA 99164, USA
| | - D F Waldron
- Texas AgriLife Research, San Angelo, TX 76901, USA
| | - K I O'Rourke
- Department of Veterinary Microbiology and Pathology, Washington State University, 3003 ADBF, WSU, Pullman, WA 99164, USA; United States Department of Agriculture, Agricultural Research Service, Animal Disease Research Unit, 3003 ADBF, WSU, Pullman, WA 99164, USA
| | - S N White
- Department of Veterinary Microbiology and Pathology, Washington State University, 3003 ADBF, WSU, Pullman, WA 99164, USA; United States Department of Agriculture, Agricultural Research Service, Animal Disease Research Unit, 3003 ADBF, WSU, Pullman, WA 99164, USA; Center for Reproductive Biology, Washington State University, 3003 ADBF, WSU, Pullman, WA 99164, USA.
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14
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Abstract
Scrapie was the first prion disease to be recognised and the study of this disease in sheep and goats has provided a wealth of information not only for scrapie but also for the other prion diseases. All prion diseases are under strong genetic control of the prion gene PRNP, independent of whether they are typical or atypical scrapie and which of the different prion strains is causing infection. Decades of studies using experimental disease challenges and field surveys have established disease association models, in which species-specific amino acid variations in the prion or PrP protein, encoded by the PRNP gene, can predict disease susceptibility or resistance. PRNP genetics represents an important and successful basis for implementing scrapie eradication strategies in sheep and goats. In general terms these studies have revealed that there appear to be many more amino acid changes in PrP leading to increased resistance than to higher susceptibility. Most changes are in the globular part of PrP protein and three regions appear to have major influence. This knowledge can be transferred into prion diseases of other species to facilitate genetic control strategies. However, an obstacle remains with the lack of fully understanding the underlying molecular mechanism, impeding our ability to deal with the difference in the genetic control between typical and atypical forms of scrapie or to predict association in newly infected species. This chapter will discuss the advances in both typical and atypical scrapie from a genetic perspective.
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Affiliation(s)
- Wilfred Goldmann
- Neurobiology Division, The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, United Kingdom.
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